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[/] [or1k/] [tags/] [nog_patch_49/] [or1ksim/] [cpu/] [common/] [parse.c] - Rev 138
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/* parce.c -- Architecture independent load Copyright (C) 1999 Damjan Lampret, lampret@opencores.org This file is part of OpenRISC 1000 Architectural Simulator. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <stdio.h> #include <ctype.h> #include <string.h> #include <stdlib.h> #include "abstract.h" #include "arch.h" #include "dmmu.h" #include "coff.h" #include "debug_unit.h" #include "opcode/or32.h" #include "parse.h" #define MAXLINE_LEN 18000 extern char *disassembled; /* Unused mem memory marker. It is used when allocating program and data memory during parsing */ unsigned int freemem; /* Translation table provided by microkernel. Only used if simulating microkernel. */ static unsigned long transl_table; /* Used to signal whether during loading of programs a translation fault occured. */ static unsigned long transl_error; int nonempty(char *line) { int i; for(i = 0; i < strlen(line); i++) if (!isspace(line[i])) return(1); return(0); } int nondigit(char *line) { int i; for(i = 0; i < strlen(line); i++) if (!isdigit(line[i])) return(1); return(0); } char *strtoken(char *in, char *out, int which) { char *super; char *sub; char *newline; super = strdup(in); sub = strtok(super, " \t"); while (sub && --which) sub = strtok(NULL, " \t"); if (sub && !which) { if ((newline = strchr(sub, '\n'))) newline[0] = '\0'; strcpy(out, sub); } else out[0] = '\0'; free(super); if ((newline = strchr(out, '\r'))) /* get rid of CR */ newline[0] = '\0'; return(out); } /* Used only by the simulator loader to translate logical addresses int ophysical. If loadcode() is called with valid virtphy_transl pointer to a table of translations then translate() performs translation otherwise phy address is equal to logical. */ static unsigned int translate(unsigned int laddr,int* breakpoint) { int i; /* No translation (i.e. when loading kernel into simulator) /* printf("transl_table=%x laddr=%x\n", transl_table, laddr); printf("laddr=%x\n", laddr);*/ if (transl_table == 0) return laddr; /* Try to find our translation in the table. */ for(i = 0; i < (MEMORY_LEN / PAGE_SIZE) * 16; i += 16) if ((laddr & ~(PAGE_SIZE - 1)) == evalsim_mem32(transl_table + i,breakpoint)) { setsim_mem32(transl_table + i + 8, -2); /* Page modified */ printf("found paddr=%x\n", evalsim_mem32(transl_table + i + 4,breakpoint) | (laddr & (PAGE_SIZE - 1))); return (unsigned long)evalsim_mem32(transl_table + i + 4,breakpoint) | (laddr & (unsigned long)(PAGE_SIZE - 1)); } /* Allocate new phy page for us. */ for(i = 0; i < (MEMORY_LEN / PAGE_SIZE) * 16; i += 16) if (evalsim_mem32(transl_table + i + 8,breakpoint) == 0) { setsim_mem32(transl_table + i, laddr & ~(PAGE_SIZE - 1)); /* VPN */ setsim_mem32(transl_table + i + 4, (i/16) * PAGE_SIZE); /* PPN */ setsim_mem32(transl_table + i + 8, -2); /* Page modified */ printf("newly allocated ppn=%x\n", (unsigned long)evalsim_mem32(transl_table + i + 4,breakpoint)); printf("newly allocated .ppn=%x\n", (unsigned long)transl_table + i + 4); printf("newly allocated ofs=%x\n", (unsigned long)(laddr & (PAGE_SIZE - 1))); printf("newly allocated paddr=%x\n", (unsigned long)evalsim_mem32(transl_table + i + 4,breakpoint) | (laddr & (PAGE_SIZE - 1))); return (unsigned long)evalsim_mem32(transl_table + i + 4,breakpoint) | (laddr & (unsigned long)(PAGE_SIZE - 1)); } /* If we come this far then all phy memory is used and we can't find our page nor allocate new page. */ transl_error = 1; printf("can't translate\n", laddr); exit(1); return -1; } void adddatastr(char *str,int* breakpoint) { if (str) str++; else return; for(; *str && *str != '\"'; str++, translate(freemem++,breakpoint)) if (*str == '\\') switch (*++str) { case 'n': mem[translate(freemem,breakpoint)].data = '\n'; break; case 't': mem[translate(freemem,breakpoint)].data = '\t'; break; case 'r': mem[translate(freemem,breakpoint)].data = '\r'; break; case '0': mem[translate(freemem,breakpoint)].data = '\0'; break; default: break; } else mem[translate(freemem,breakpoint)].data = *str; } /* Modified by CZ 26/05/01 */ /* Added code for new mode operation */ void adddataword(char *item,int* breakpoint) { unsigned long num; if (isdigit(*item)) num = strtoul(item, NULL, 0); else num = eval_label(item); debug("adddataword: [0x%x] <= %x\n", translate(freemem,breakpoint), num); mem[translate(freemem,breakpoint)].data = (char) (num >> 24); mem[translate(freemem + 1,breakpoint)].data = (char) (num >> 16); mem[translate(freemem + 2,breakpoint)].data = (char) (num >> 8); mem[translate(freemem + 3,breakpoint)].data = (char) (num); if(!GlobalMode) freemem += 4; } void adddatahalf(char *item,int* breakpoint) { unsigned long num; if (isdigit(*item)) num = strtoul(item, NULL, 0); else num = eval_label(item); mem[translate(freemem,breakpoint)].data = (char) (num >> 8); mem[translate(freemem + 1,breakpoint)].data = (char) (num); freemem += 2; } void adddatabyte(char *item,int* breakpoint) { unsigned long num; if (isdigit(*item)) num = strtoul(item, NULL, 0); else num = eval_label(item); mem[translate(freemem,breakpoint)].data = (char) (num); freemem++; } void adddataspace(char *num) { freemem += atol(num); } void addlabel(char *label, unsigned long freemem,int* breakpoint) { struct label_entry **tmp; debug("Adding label %s at 0x%x\n", label, translate(freemem,breakpoint)); tmp = &mem[translate(freemem,breakpoint)].label; for (; *tmp; tmp = &((*tmp)->next)); *tmp = malloc(sizeof(**tmp)); (*tmp)->name = malloc(strlen(label)+1); strcpy((*tmp)->name, label); (*tmp)->next = NULL; return; } char null_str[1] = "\0"; /* Modified by CZ 26/05/01 */ /* Replaced several calls to translate(freemem) with vaddr */ /* Added new mode execution code */ /* Changed parameters so address can be passed as argument */ void addprogram(unsigned long address, unsigned long insn, int* breakpoint) { char insn_first2_char[3]; int vaddr = GlobalMode ? translate(address,breakpoint) : translate(freemem,breakpoint); debug("addprogram 1\n"); *breakpoint += CheckDebugUnit(DebugStoreAddress,vaddr); /* 22/06/01 MM*/ *breakpoint += CheckDebugUnit(DebugStoreData,insn); setsim_mem32 (vaddr, insn); if(!GlobalMode) freemem += insn_len (insn_decode (insn)); } /* Load big-endian COFF file. At the moment it doesn't load symbols yet. */ void readfile_coff(char *filename, short sections) { FILE *inputfs; char inputbuf[4]; unsigned long insn; signed long sectsize; COFF_AOUTHDR coffaouthdr; struct COFF_scnhdr coffscnhdr; int len; char item[MAXLINE_LEN]; char item2[MAXLINE_LEN]; int firstthree = 0; int breakpoint = 0; if (!(inputfs = fopen(filename, "r"))) { perror("readfile_coff"); exit(1); } if (fseek(inputfs, sizeof(struct COFF_filehdr), SEEK_SET) == -1) { fclose(inputfs); perror("readfile_coff"); exit(1); } if (fread(&coffaouthdr, sizeof(coffaouthdr), 1, inputfs) != 1) { fclose(inputfs); perror("readfile_coff"); exit(1); } while(sections--) { long scnhdr_pos = sizeof(struct COFF_filehdr) + sizeof(coffaouthdr) + sizeof(struct COFF_scnhdr) * firstthree; if (fseek(inputfs, scnhdr_pos, SEEK_SET) == -1) { fclose(inputfs); perror("readfile_coff"); exit(1); } if (fread(&coffscnhdr, sizeof(struct COFF_scnhdr), 1, inputfs) != 1) { fclose(inputfs); perror("readfile_coff"); exit(1); } printf("Section: %s,", coffscnhdr.s_name); printf(" vaddr: 0x%.8x,", COFF_LONG_H(coffscnhdr.s_vaddr)); printf(" size: 0x%.8x,", COFF_LONG_H(coffscnhdr.s_size)); printf(" scnptr: 0x%.8x\n", COFF_LONG_H(coffscnhdr.s_scnptr)); sectsize = COFF_LONG_H(coffscnhdr.s_size); /* A couple of sanity checks. */ if (translate(COFF_LONG_H(coffscnhdr.s_vaddr),&breakpoint) < MEMORY_START) { printf("Section %s starts out of ", coffscnhdr.s_name); printf("memory (at %x)\n", COFF_LONG_H(coffscnhdr.s_vaddr)); exit(1); } if (translate(COFF_LONG_H(coffscnhdr.s_vaddr) + sectsize,&breakpoint) > MEMORY_START + MEMORY_LEN) { printf("Section %s ends out of ", coffscnhdr.s_name); printf("memory.\n"); exit(1); } if (++firstthree == 1 && strcmp(coffscnhdr.s_name, ".text") != 0) { printf("First section should be .text (%s instead)\n", coffscnhdr.s_name); exit(1); } if (firstthree == 2 && strcmp(coffscnhdr.s_name, ".data") != 0) { printf("Second section should be .data (%s instead)\n", coffscnhdr.s_name); exit(1); } if (firstthree == 3 && strcmp(coffscnhdr.s_name, ".bss") != 0) { printf("Third section should be .bss (%s instead)\n", coffscnhdr.s_name); exit(1); } /* loading section */ freemem = COFF_LONG_H(coffscnhdr.s_vaddr); debug("Starting to load at 0x%x", freemem); if (fseek(inputfs, COFF_LONG_H(coffscnhdr.s_scnptr), SEEK_SET) == -1) { fclose(inputfs); perror("readfile_coff"); exit(1); } while (sectsize > 0 && (len = fread(&inputbuf, sizeof(inputbuf), 1, inputfs))) { insn = COFF_LONG_H(inputbuf); len = insn_len (insn_decode (insn)); if (len == 2) { fseek(inputfs, -2, SEEK_CUR); debug("readfile_coff: %x 0x%x ", sectsize, insn >> 16); } else debug("readfile_coff: %x 0x%x ", sectsize, insn); addprogram (freemem, insn, &breakpoint); sectsize -= len; } } if (firstthree < 3) { printf("One or more missing sections. At least"); printf(" three sections expected (.text, .data, .bss).\n"); exit(1); } if (firstthree > 3) { printf("Warning: one or more extra sections. These"); printf(" sections were handled as .data sections.\n"); } fclose(inputfs); printf("Finished loading COFF.\n"); return; } /* Load symbols from big-endian COFF file. */ void readsyms_coff(char *filename, unsigned long symptr, long syms) { FILE *inputfs; struct COFF_syment coffsymhdr; int breakpoint = 0; if (!(inputfs = fopen(filename, "r"))) { perror("readsyms_coff"); exit(1); } if (fseek(inputfs, symptr, SEEK_SET) == -1) { fclose(inputfs); perror("readsyms_coff"); exit(1); } while(syms--) { if (fread(&coffsymhdr, COFF_SYMESZ, 1, inputfs) != 1) { fclose(inputfs); perror("readsyms_coff"); exit(1); } debug("Symbol: %s,", coffsymhdr.e.e_name); debug(" val: 0x%.8x,", COFF_LONG_H(coffsymhdr.e_value)); debug(" auxs: %c\n", coffsymhdr.e_numaux); if (strlen(coffsymhdr.e.e_name) && strlen(coffsymhdr.e.e_name) < 9) addlabel(coffsymhdr.e.e_name, COFF_LONG_H(coffsymhdr.e_value),&breakpoint); } fclose(inputfs); printf("Finished loading symbols.\n"); return; } /* Identify file type and call appropriate readfile_X routine. It only handles orX-coff-big executables at the moment. */ void identifyfile(char *filename) { FILE *inputfs; struct COFF_filehdr coffhdr; size_t len; if (!(inputfs = fopen(filename, "r"))) { fprintf(stderr, "xx %s", filename); perror("identifyfile1"); fflush(stdout); fflush(stderr); exit(1); } if (fread(&coffhdr, sizeof(coffhdr), 1, inputfs) == 1) { if (COFF_SHORT_H(coffhdr.f_magic) == 0x17a) { unsigned long opthdr_size; printf("COFF magic: 0x%.4x\n", COFF_SHORT_H(coffhdr.f_magic)); printf("COFF flags: 0x%.4x\n", COFF_SHORT_H(coffhdr.f_flags)); printf("COFF symptr: 0x%.8x\n", COFF_LONG_H(coffhdr.f_symptr)); if ((COFF_SHORT_H(coffhdr.f_flags) & COFF_F_EXEC) != COFF_F_EXEC) { printf("This COFF is not an executable.\n"); exit(1); } opthdr_size = COFF_SHORT_H(coffhdr.f_opthdr); if (opthdr_size != sizeof(COFF_AOUTHDR)) { printf("COFF optional header is missing or not recognized.\n"); printf("COFF f_opthdr: 0x%.2x\n", opthdr_size); exit(1); } fclose(inputfs); readfile_coff(filename, COFF_SHORT_H(coffhdr.f_nscns)); readsyms_coff(filename, COFF_LONG_H(coffhdr.f_symptr), COFF_LONG_H(coffhdr.f_nsyms)); return; } else { printf("Not COFF, quiting.\n"); fclose(inputfs); exit (1); } } else { printf("yy %s", filename); perror("identifyfile2"); } fclose(inputfs); return; } /* Loads file to memory starting at address startaddr and returns freemem. */ unsigned long loadcode(char *filename, unsigned long startaddr, unsigned long virtphy_transl) { int breakpoint = 0; transl_error = 0; transl_table = virtphy_transl; freemem = startaddr; printf("loadcode: filename %s startaddr=%x virtphy_transl=%x", filename, startaddr, virtphy_transl); identifyfile(filename); if (transl_error) return -1; else return translate(freemem,&breakpoint); }
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